# AD 74-25-01: Fuel System Hose

- Type: Airworthiness directive
- Status: Current
- Products: General Electric CT58-140-1 and CT58-140-2
- Effective: December 10, 1974
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-2009
- Registered aircraft: 53 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CA98B4223CC343CB8625682C0052B1C8.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/74-25-01

## The airworthiness directive

74-25-01 GENERAL ELECTRIC COMPANY: Amendment 39-2009. Applies to General Electric Company CT58-140 engine fuel system hose, P/N 3007T22P02 (VIN SR 9844CC6-00910).

Compliance required unless already accomplished, within the next fifteen (15) days time in service after the effective date of this AD.

To prevent possible failure of the fuel filter to flow divider hose, remove hose P/N 3007T22P02 (VIN SR 9844CC6-00910) with identification bands bearing date and/or serial number as follows:

November 72 or December 72 (3 parts total), and hoses dated December 73 having Serial Numbers 1507, 1508, 1509, 1510, 1512, 1514, 1516, 1517, 1519, 1520, 1522, and 1525 (12 parts total).

Replace hoses removed with new hose, P/N 3007T22P02 (VIN SR 9844CC6-00910) or P/N 3007T22P02 (VIN 95387), which are hoses other than those of serial nubmer and/or date identified for removal above.

Upon request of the operator, an FAA Maintenance Inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA, New England Region, may adjust the inspection interval specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for that operator.

NOTE: Replacement procedure reference material is contained in General Electric Alert Service Bulletin (CT58) A73-68.

This amendment becomes effective December 10, 1974.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1E3](https://openairdocs.org/tcds/1E3): General Electric Company; names 2 of 5 models: CT58-140-2, CT58-140-1

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 53 (0 by airframe model, 53 by engine model)
- Makers: Sikorsky 42, Boeing-Vertol 5, Columbia Helicopters 2, Boeing V-Columbia Helicopters 1, Carson Helicopters / Sikorsky 1, Kawasaki Vertol 1, Vertol 1

Models with the most aircraft:

- [GE CT58-140-2](https://openairdocs.org/engine/ge-ct58-140-2): 33 aircraft (engine model)
- [GE CT58-140-1](https://openairdocs.org/engine/ge-ct58-140-1): 20 aircraft (engine model)

All 2 models: https://openairdocs.org/ad/74-25-01/models.md
Every aircraft: https://openairdocs.org/ad/74-25-01/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.